JP2017007820A - Elevator repair method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an elevator repair method capable of improving working efficiency.SOLUTION: An elevator repair method comprises: a lifting device installation step for installing a winch 6 for lifting a car 1 on a hoistway 100 and connecting the winch 6 to the car 1; an existing lifting device separation step for separating the car 1 and a car lifting device; a retractor type crash inhibition appliance installation step for, installing a safety block 7 having a reel 72 and a strap 73 wound around the reel 72, on the hoistway 100, and connecting the strap 73 to an emergency stop lever 52; and a car lifting step for driving the winch 6 and lifting the car 1, after performing, the existing lifting device separation step, the lifting device installation step, and the retractor type crash inhibition appliance installation step.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an elevator repair method for repairing an elevator equipped with an emergency stop device for emergency stopping a car.

  Conventionally, a lifting device for raising and lowering a car and a car, and an emergency stop rope provided in a car and provided in a braking member hoistway for stopping the car by being pressed against the guide rail and extending in the height direction And an emergency stop device provided with an emergency stop device having a rope gripping tool that stops the car by pressing the braking member against the guide rail by grasping the emergency stop rope provided when the car drops. (For example, refer to Patent Document 1).

JP2012-51702A

  However, the emergency stop rope must be installed in the hoistway over the entire range in which the car ascends and descends, and there is a problem that work efficiency in the repair of the elevator is poor.

  This invention provides the repair method of the elevator which can improve work efficiency.

  The elevator refurbishing method according to the present invention includes a car lifting device for raising and lowering a car, a car lifting device, and an emergency stop lever rotatably provided on the car, so that the car is brought to an emergency stop by hitting the car guide rail. An elevator repair method for repairing an elevator equipped with a stop device, wherein an existing lifting device separating step for separating the car and the car lifting device and a lifting device for lifting the car are installed in the hoistway, A lifting device installation process for connecting the lifting device to the car, a retractor type fall prevention device having a reel and a strap wound around the reel in the hoistway, and connecting the strap to the emergency stop lever. After the installation process, the existing lifting device separation process, the lifting apparatus installation process, and the retractor type fall prevention instrument installation process, the lifting apparatus is driven, And a lifting your process or moving up and down the.

  According to the elevator refurbishment method according to the present invention, the retractor type fall prevention device having the reel and the strap wound around the reel is installed in the hoistway, and the strap is connected to the emergency stop lever, so that the lifting device is driven. When raising and lowering the cage and the support of the cage by the lifting device is released, the emergency stop lever is rotated by the retractor type fall prevention device, and the emergency stop device is pressed against the guide rail for the cage. The car stops. Thereby, it is not necessary to install an emergency stop rope in the hoistway over the entire range in which the car moves up and down, and the work efficiency in repairing the elevator can be improved.

It is a side view which shows the elevator renovated by the elevator renovation method which concerns on Embodiment 1 of this invention. It is a side view which shows a mode that the elevator of FIG. 1 is repaired. It is an enlarged view which shows the safety block of FIG.

Embodiment 1 FIG.
1 is a side view showing an elevator refurbished by an elevator renovation method according to Embodiment 1 of the present invention. In the figure, the elevator refurbished by this elevator refurbishing method is a hydraulic elevator. The elevator is provided in the car 1 that moves up and down the hoistway 100, the car guide rail 2 that stands on the hoistway 100 and guides the car 1, the hydraulic jack 3 provided in the hoistway 100, and the hydraulic jack 3. A main rope 4 and an emergency stop device 5 provided on the car 1 for stopping the car 1. The hydraulic jack 3 and the main rope 4 constitute a car lifting device that lifts and lowers the car 1.

  The hydraulic jack 3 includes a cylinder 31 provided in the hoistway 100 so as to extend in the height direction and supplied with oil from the outside, a plunger 32, and a sheave 33. The plunger 32 moves in the height direction with respect to the cylinder 31 according to the amount of oil supplied to the cylinder 31. The sheave 33 is provided in a state where the main rope 4 is wound around the upper end portion of the plunger 32.

  One end of the main rope 4 is fixed to the floor of the hoistway 100 and the other end is fixed to the lower portion of the car 1. An intermediate portion of the main rope 4 is wound around the sheave 33 from above. When the plunger 32 moves in the height direction, the sheave 33 moves in the height direction, and the other end of the main rope 4 moves in the height direction. The car 1 moves up and down the hoistway 100 as the other end of the main rope 4 moves in the height direction.

  The emergency stop device 5 is a slack rope type emergency stop device. The emergency stop device 5 includes an emergency stop device main body 51 fixed to the car 1 so as to be adjacent to the car guide rail 2, a stop position pressed against the car guide rail 2, and a release position separated from the car guide rail 2. And an emergency stop lever 52 that is displaced between the two. When the position of the car guide rail 2 is the stop position, the emergency stop lever 52 hits the car guide rail 2, and the emergency stop main body 51 and the emergency stop lever 52 sandwich the car guide rail 2. The car 1 is stopped when the emergency stop device main body 51 and the emergency stop lever 52 sandwich the car guide rail 2. The emergency stop lever 52 is provided so as to be rotatable with respect to the car 1. The emergency stop lever 52 is displaced between the stop position and the release position by rotating.

  FIG. 2 is a side view showing how the elevator shown in FIG. 1 is repaired. When repairing an elevator, an elevator repair device is used. The elevator repair device includes a winch (lifting device) 6 for raising and lowering the car 1 and a safety block (retractor-type crash prevention device) 7 for emergency stopping the car 1. In this example, the elevator repair device includes two winches 6. The number of winches 6 is not limited to two, and may be one or three or more.

  The winch 6 includes a drum portion (lifting device main body) 61 including a motor, and a wire 62 having a base end portion provided on the drum portion 61. The drum unit 61 is supported by a machine base 101 provided at the upper part of the hoistway 100. The wire 62 is fed from the drum unit 61 or wound around the drum unit 61 when the drum unit 61 is driven. The tip of the wire 62 is connected to the car 1. Accordingly, the car 1 moves up and down the hoistway 100 when the wire 62 is fed out of the drum unit 61 or wound around the drum unit 61. In FIG. 2, the wire 62 of the winch 6 is connected to the upper part of the car 1. However, when the elevator 1 is repaired, the car 1 is disassembled and the side walls and the ceiling of the car 1 are removed from the car floor. The wire 62 of the winch 6 is connected to the car floor of the car 1. The car 1 connected to the wire 62 is used as a gondola for transporting members when refurbishing the elevator.

  FIG. 3 is an enlarged view showing the safety block 7 of FIG. The safety block 7 includes a mounting plate 71 fixed to the car guide rail 2, a reel 72 supported by the mounting plate 71, and a strap 73 having a base end wound around the reel 72. The safety block 7 further includes a spring (not shown) that is provided on the reel 72 and biases the reel 72 in a direction in which the strap 73 is wound around the reel 72. The strap 73 is fed out from the reel 72 by pulling the strap 73 in the direction in which the strap 73 is fed out from the reel 72 against the biasing force of the spring. The strap 73 includes a spring portion 731 that expands and contracts in the longitudinal direction. A pulling rope (not shown) is connected to the strap 73.

  The reel 72 further includes a rotation blocking unit (not shown) that blocks the rotation of the reel 72 when the rotation speed of the reel 72 exceeds a preset value. Therefore, when the strap 73 is pulled in a direction in which the strap 73 is sent out from the reel 72 at a speed equal to or higher than a preset speed, the sending out from the reel 72 is stopped.

  The tip of the strap 73 is connected to the emergency stop lever 52. When the car 1 is lowered so that the rotation speed of the reel 72 is less than a preset speed, the position of the safety lever 52 is set to the release position against the urging force of the spring of the safety block 7. On the other hand, when the car 1 is lowered so that the rotation speed of the reel 72 becomes equal to or higher than a preset speed, the feeding of the strap 73 from the reel 72 is stopped, so that the emergency stop lever 52 is moved by the safety block 7. Displace from the release position to the stop position. Thereby, the car 1 is brought to an emergency stop.

  Next, an elevator repair method will be described. First, the car 1 is moved to the top floor, and then the car 1 is fixed to the car guide rail 2. Then, the winch 6 for raising / lowering the car 1 is installed on the machine base 101 provided in the upper part of the hoistway 100, and the wire 62 of the winch 6 is connected to the car 1 (lifting device installation process).

  Then, the car 1 and the main rope 4 are separated (existing lifting device separating step). In the existing lifting / lowering device separation step, the hydraulic jack 3 and the main rope 4 are removed from the hoistway 100.

  Thereafter, the safety block 7 having the reel 72 and the strap 73 wound around the reel 72 is installed in the hoistway 100, and the tip of the strap 73 is connected to the emergency stop lever 52 (retractor-type fall prevention device installation step). In the retractor-type crash prevention device installation step, the reel 72 is fixed to the car guide rail 2 via the mounting plate 71. Further, in the retractor type fall prevention device installation process, an operator who has entered the pit of the hoistway 100 grabs the pulling rope and extends the strap 73 downward, and connects the strap 73 to the emergency stop lever 52.

  After the lifting device installation step, the existing lifting device separation step, and the retractor-type crash prevention device installation step, the winch 6 is driven to raise and lower the car 1 (car lifting step). Members required for elevator repair are placed on the car 1 and moved up and down. This completes the elevator repair.

  As described above, according to the elevator repair method according to the first embodiment of the present invention, the safety block 7 having the reel 72 and the strap 73 wound around the reel 72 is installed in the hoistway 100, and the strap 73 is Since the winch 6 is driven to raise and lower the car 1 when the winch 6 is driven and the support of the car 1 by the winch 6 is released, the safety block 7 is rotated by the safety block 7 because it is connected to the emergency stop lever 52. Then, the emergency stop device 5 is pressed against the car guide rail 2 and the car 1 stops. Thereby, it is not necessary to install the emergency stop rope in the hoistway 100 over the entire range in which the car 1 moves up and down, and the work efficiency in the repair of the elevator can be improved. Moreover, since the safety lever 52 is displaced using the safety block 7, the safety when using the car 1 as a gondola can be improved.

  Further, since the strap 73 includes a spring portion 731 that expands and contracts in the longitudinal direction, when the feeding of the strap 73 from the reel 72 is stopped, the emergency stop lever 52 is moved from the release position while the spring portion 731 is extended. Displace to the stop position. Thereby, the breakage of the safety block 7 due to the stop of the car 1 and the malfunction of the safety block 7 when the car 1 is activated can be prevented.

  Further, since the reel 72 is supported by the car guide rail 2, an operator on the car 1 can easily install the safety block 7.

  In the first embodiment, the hydraulic elevator is described as an example of the elevator, but an elevator other than the hydraulic elevator may be used.

  In the first embodiment, the method in which the existing lifting device separation process is performed after the lifting device installation process has been described. However, the existing lifting device separation process is performed first, and then the lifting device installation process. May be a method of performing.

  1 car, 2 guide rails for car, 3 hydraulic jack, 4 main rope, 5 emergency stop device, 6 winch (lifting device), 7 safety block (retractor type fall prevention device), 31 cylinder, 32 plunger, 33 sheave 51 emergency stop device main body 52 emergency stop lever 61 drum part (lifting device main body) 62 wire 71 mounting plate 72 reel 73 strap 100 hoistway 101 machine stand 731 spring part

Claims (3)

An elevator comprising: a car, a car lifting device that lifts and lowers the car, and an emergency stop device that has an emergency stop lever rotatably provided on the car and that makes an emergency stop by hitting the car guide rail An elevator repair method for repairing
A lifting device for raising and lowering the car is installed in a hoistway, and a lifting device installation step for connecting the lifting device to the car;
An existing lifting device separating step for separating the car and the car lifting device;
A retractor type fall prevention device installation step of installing a retractor type fall prevention device having a reel and a strap wound around the reel in the hoistway, and connecting the strap to the emergency stop lever; and
A car lifting / lowering step of driving the lifting device to lift / lower the car after the existing lifting / lowering device separation step, the lifting device installation step and the retractor-type fall prevention device installation step; Elevator repair method.   The elevator repair method according to claim 1, wherein the strap includes a spring portion that expands and contracts in a longitudinal direction.   3. The elevator repair method according to claim 1, wherein in the retractor-type crash prevention device installation step, the reel is supported by the car guide rail. 4.

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